Re: Amp frequency response
most amps will be flat down to 20hz, and roll off around 7hz.
Either way, you should be able to reproduce 15hz with most amps, at worst it might take some preamp boost. The main thing to realize is that most speakers, even subwoofers, will be very inefficient at low frequencies and that you will need a displacement and power, to get meaningful SPL at these frequencies. Which amp are you looking at?